Larysa B Royal Oak , MI August 20, 2020 Appliance: Thermador Dishwasher DWHD640JFP/D5 Thermador Dishwasher Dwhd640jfp/D5: Detergent dispenser not opening. How to replace Dishwasher Detergent Dispenser. Replaced the dispenser; I watched the video linked to the replacement dispenser but the Thermador dishwasher door details were not exactly the same so putting it all back together needed some more video searches. All in all the problem is solved. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes